Spark-arrester



H. MORRIS.

SPARK ARRESTER. APPLICATION FILED NOV.14. 191s.

1 ,358,095 Patented Nov. 9, 1920.

UNITEDSTATES PATENT OFFICE.

HUGH oirnrs, or CHICAGO, ILLINOIS.

SPARK-ARRESTEB.

To all whom it may concern:

Be it known that I, HUGH MORRIS, a citi zen of'the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Spark- ..trresters, of which the following is a specification. V

ldy invention relates to spark arresters, and has fol-"its principal objectthe provision of a simple and efficient device ofthe char acter mentioned. I f 7 A further object is the provision of "a spark arresting drum which. can be easily and quickly adjusted into position in locomotives now in use or being constructed, or removed therefrom.

()ther objects will appear hereinafter.

An embodiment of myinvention is shown in the accompanying drawing forming a part of this specification, and in which,

Figure 1 is a vertical section taken through the front end portion of a locomotive equipped with my invention, and

- Fig. 2 is a section of the same taken on line 22 of Fig. 1.

Referring more particularly to the drawing, I have indicated the front end portion of a locomotive, showing particularly the smoke box 5 and connecting parts. The smoke box 5 is intended to indicate any common or desired form. Such smoke boxes usually have a deflecting plate 6 positioned in front of the front ends of the tubes 7 which tend to deflect the products of combustion coming from the tubes so as to get an even draft on all of the tubes. The front end of the smoke box is closed by a plate 8, which is of usual construction, and it is preferred that, where such plates are of sufficient size, my spark arrester be made of a size to easily pass through the opening covered by plate 8. This saves taking off the front plate 9 of the locomotive when it is desired to gain access either to the spark arrester or the interior of the smoke box 5.

The locomotive is provided with a smoke stack 10 which may be of conventional con struction. The form I have indicated shows the smoke stack extending down through the top of the wall of the smoke box but any other arrangement may be provided. The important thing being that the smoke stack be extended from the wall 11 down to a position communicating with my: spark arrester, the smoke stack 10 and extension 12 Specification of Letters Patent. V- Patentgd Nov 9, 1920, lipplicatioirfiled November 14, 1918. serial m. 262,594." 2 i may befornied of one or more pieces, as desired. p l

its is the usual custom the exhaust nozzle 13 extends through the bottom of the smoke box wall 11 into the smokejbox 5 inorder to induce a' draftup the smoke stack 10.

In my construction it is desired to have the top of the nozzle 13 at sufficient height to enter my spark arrester so as to exhaust directly into the spark arrester. p My spark arrester proper comprises a housing having a plane top wall and a bottom wall 15. The top. wall it is provided with an opening 16 preferably of a SlZG COI responding to the'bore of the extension 12 of the smoke stack which provides a communication between. the smoke stack and the interior of the spark arrester. A flange 17 may be secured to the top of the wall 14- so as to provide a socket for the bottom of extension 12 of the smoke stack. The wall 15 is provided with an opening 18 through.

which the nozzle 13 projects. It is also preferred to provide a flange 19 on the bottom of wall 15 so as to make a better sealing joint around the opening 18 and to provide a socket for the nozzle 13 in wall 15.

The rear wall 20 of the spark arrester is preferably plane and formed of solid material similar to that-in walls 14: and 15. These walls may be of sheet metal or any preferred material. The front wall 21 is also preferably plane but disposed inclined forwardly. I have indicated wall 20 as be ing a rear wall and wall 21 as being a forward wall simply as convenient terms in referring to these walls. The wall 21 is formed of foraminous or reticulate material having openings therein sufficiently small to prevent live coals from passing from the smoke box into the smoke stack. The wall 21 is preferably secured to the top and side walls so that it can be removed to gain access to the interior of the spark arrester. This wall 21 may be secured by bolts 22 or in any other preferred manner.

The side walls 23 of my spark arrester are preferably formed of a material similar to front wall 21 and are fora-ruinous or reticulate, so that live coals and particles of burning fuel cannot pass into the smoke stack. The walls 23 are preferably concentric with the walls 11 of the smoke box. This has a particular advantage in that the particles of burning fuel, which have been drawn from the tubes 7 by the draft causedby nozzle 13 discharging toward the smoke stack 10, are caused to engage the walls '23 both in passing from the lower part of the smoke box toward the upper part and again upon falling from the upper part to the lower part of said smoke box. The curved Walls 23 also afford a greater surface than were these walls plane and'vertical.

coals'upon hitting the plate 6 are broken by the impact and fall to the lowerlpartof the smokebo-x where the draft draws them toward the smokestack causing them to en- 7 gage the spark-arresting chamber where they are further broken by impinging, the Walls The- V angularity'of the front wall also facilitates drawing the particles of burning fuel against 21 and 23 and finally are extinguished and most of them pass through the openings of said walls and out through the Smokestack. The coals which have not been broken fall to the bottom of thesmokebox and must be removed In practice it is found that most a of the coals are broken and pass out of the smokestack leavingbut a very few to be removed from the bottom of the Smokestack.

I claim: p

A spark arrester comprising a housing having substantially plane and parallel top and bottom ,walls of solid material with a smoke discharge opening in the top wall and an engine exhaust opening in its bottom wall, the side walls of said housing being foraminous and curved outwardly, the front 1 wall being foraminousand inclined forwardly, and vthe rear wall being substantially "planeand of Solid-material.

In testimony whereof I havesigned my name to this specification on'this 29th day of October, A. D. 1918. g I

. V HUGH MORRIS. 

